Perhaps you should try some spelling variations:
"nhung chong luan van. noi dung thuoc ma" » "nhung cong luan van. noi dung thuoc ma", "nhung phong luan van. noi dung thuoc ma", "nhung phuong luan van. noi dung thuoc ma", "nhung thong luan van. noi dung thuoc ma", "nhung chung luan van. noi dung thuoc ma", "nhung chong luan van. hoc dung thuoc ma", "nhung chong luan van. noi dung hoc ma", "nhung chong luan van. noi dung duoc ma"
"nhung thoi quy van. boi duong uoc mo" » "nhung thi quy van. boi duong uoc mo", "phung thi quy van. boi duong uoc mo", "nhung loi quy van. boi duong uoc mo", "nhung thoi quy van. hai duong uoc mo", "nhung thoi quy van. doi tuong uoc mo", "nhung thoi quy van. con duong uoc mo", "nhung thoi quy van. boi huong uoc mo", "nhung thoi quy van. boi duong hoc mo", "nhung thoi quy van. boi duong nguoc mo", "nhung thoi quen van. boi duong uoc mo", "nhung thoi ky van. boi duong uoc mo", "nhung thoi duy van. boi duong uoc mo", "nhung thoi qua van. boi duong uoc mo", "nhung thoi quyet van. boi duong uoc mo"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("nhung thoi quy van. boi duong uoc mo") OR ("nhung chong luan van. noi dung thuoc ma"))~.
• Removing quotes may allow a broader search: (( nhung thoi quy van. boi duong uoc mo ) or ( nhung chong luan van. noi dung thuoc ma ))~.
• Adding a wildcard symbol may retrieve word variants: (("nhung thoi quy van. boi duong uoc mo") or ("nhung chong luan van. noi dung thuoc ma"))*.